# -*- mode:python -*-

# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

import os
import re
import sys

from os.path import isdir, isfile, join as joinpath

from SCons.Scanner import Classic

from gem5_scons import Transform

Import('*')

if env['PROTOCOL'] == 'None':
    Return()

output_dir = Dir('.')
html_dir = Dir('html')
slicc_dir = Dir('../slicc')

sys.path[1:1] = [ Dir('..').Dir('..').srcnode().abspath ]
from slicc.parser import SLICC

slicc_depends = []
for root,dirs,files in os.walk(slicc_dir.srcnode().abspath):
    for f in files:
        if f.endswith('.py'):
            slicc_depends.append(File(joinpath(root, f)))

#
# Use SLICC
#
env["SLICC_PATH"] = env["PROTOCOL_DIRS"]
slicc_scanner = Classic("SliccScanner", ['.sm', '.slicc'], "SLICC_PATH",
                        r'''include[ \t]["'](.*)["'];''')
env.Append(SCANNERS=slicc_scanner)

def slicc_emitter(target, source, env):
    assert len(source) == 1
    filepath = source[0].srcnode().abspath

    slicc = SLICC(filepath, protocol_base.abspath, verbose=False)
    slicc.process()
    slicc.writeCodeFiles(output_dir.abspath, env['SLICC_INCLUDES'])
    if env['SLICC_HTML']:
        slicc.writeHTMLFiles(html_dir.abspath)

    target.extend([output_dir.File(f) for f in sorted(slicc.files())])
    return target, source

def slicc_action(target, source, env):
    assert len(source) == 1
    filepath = source[0].srcnode().abspath

    slicc = SLICC(filepath, protocol_base.abspath, verbose=True)
    slicc.process()
    slicc.writeCodeFiles(output_dir.abspath, env['SLICC_INCLUDES'])
    if env['SLICC_HTML']:
        slicc.writeHTMLFiles(html_dir.abspath)

slicc_builder = Builder(action=MakeAction(slicc_action, Transform("SLICC")),
                        emitter=slicc_emitter)

protocol = env['PROTOCOL']
protocol_dir = None
for path in env['PROTOCOL_DIRS']:
    if os.path.exists(path.File("%s.slicc" % protocol).abspath):
        protocol_dir = Dir(path)
        break

if not protocol_dir:
    raise ValueError("Could not find {}.slicc in PROTOCOL_DIRS".format(
        protocol))

sources = [ protocol_dir.File("%s.slicc" % protocol) ]

env.Append(BUILDERS={'SLICC' : slicc_builder})
nodes = env.SLICC([], sources)
env.Depends(nodes, slicc_depends)

append = {}
if env['CLANG']:
    append['CCFLAGS'] = '-Wno-parentheses'
for f in nodes:
    s = str(f)
    if s.endswith('.cc'):
        Source(f, append=append)
    elif s.endswith('.py'):
        SimObject(f)

